/* RESET & BASE STYLES */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Inter', sans-serif;
  background: linear-gradient(145deg, #f6f9fc, #e3eef9);
  min-height:100vh;
  display:flex;
  flex-direction:column;
  color:#1e293b;
}

/* HEADER STYLES */
header {
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(8px);
  border-bottom:1px solid rgba(148,163,184,0.2);
  padding:0.8rem 2rem;
  position:sticky;
  top:0;
  z-index:10;
}
.header-container {
  max-width:1280px;
  margin:auto;
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
}
.logo-area {
  display:flex;
  align-items:center;
  gap:0.5rem;
  font-size:1.6rem;
  font-weight:700;
}
.logo-icon {
  background: linear-gradient(145deg,#0f2b3d,#1e4a6f);
  padding:0.5rem;
  border-radius:18px;
  color:white;
  font-size:1.4rem;
}
.logo-text {
  background: linear-gradient(135deg,#0f2b3d,#1e4a6f);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav-links { display:flex; gap:2rem; align-items:center; }
.nav-links a {
  text-decoration:none;
  font-weight:900;
  color:#000000;
  transition:color 0.4s;
  font-size: 20px;
}
.nav-links a:hover { color:#ca0087; }
.nav-cta {
  background:#1e4a6f;
  color:white !important;
  padding:0.5rem 1.5rem;
  border-radius:40px;
  font-weight:600;
  border:1px solid rgba(255,255,255,0.3);
}
.nav-cta:hover { background:#123a52; }





/* MAIN CONTENT STYLES */
main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
}
.landing-card {
  max-width: 1200px;
  width: 100%;
  background: transparent;
  backdrop-filter: none;
  border-radius: 0;
  box-shadow: none;
  padding: 1rem 0;
}

/* TOOL HEADER */
.tool-header { 
  text-align: center; 
  margin-bottom: 3rem; 
}
.tool-header h1 {
  font-size: 2.8rem;
  font-weight: 700;
  color: #0f2b3d;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}
.tool-header h1 i {
  color: #3b82f6;
  font-size: 2.5rem;
}
.subhead {
  font-size: 1.1rem;
  color: #64748b;
  max-width: 600px;
  margin: auto;
  font-weight: 400;
}

/* CONVERTER PANEL */
.converter-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin: 2.5rem 0 2rem;
}
.upload-column, .result-column {
  background: transparent;
  padding: 0; 
  box-shadow: none;
  border: none;
}
.section-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
  color: #3b82f6;
  margin-bottom: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* FILE UPLOAD ZONE */
.file-zone {
  border: 2px dashed #cbd5e1;
  background: #f8fafc;
  border-radius: 1.5rem;
  padding: 3rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-bottom: 1.5rem;
}
.file-zone:hover { 
  border-color: #3b82f6; 
  background: #f1f5f9; 
  transform: translateY(-2px);
}
.file-zone i { font-size: 3rem; color: #3b82f6; margin-bottom: 1rem; }
.file-zone p { font-weight: 600; color: #1e293b; font-size: 1.1rem; }
.file-zone small { color: #94a3b8; font-size: 0.85rem; }

/* QUALITY CONTROL */
.quality-control {
  background: #f1f5f9;
  border-radius: 1.2rem;
  padding: 1.2rem;
  margin-bottom: 1.5rem;
}
.quality-header {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 0.8rem;
}
#qualityValue {
  background: #3b82f6;
  color: white;
  padding: 0.2rem 0.7rem;
  border-radius: 6px;
  font-size: 0.85rem;
}
input[type=range] {
  width: 100%;
  height: 6px;
  background: #cbd5e1;
  border-radius: 10px;
  -webkit-appearance: none;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  background: white;
  border: 3px solid #3b82f6;
  border-radius: 50%;
  cursor: pointer;
}

/* PREVIEWS */
.preview-box {
  background: #f8fafc;
  border-radius: 1.2rem;
  padding: 1.2rem;
  margin: 1.5rem 0;
  border: 1px solid #e2e8f0;
}
.preview-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: #64748b;
  margin-bottom: 0.8rem;
  display: flex;
  justify-content: space-between;
}
.image-preview {
  background: white;
  border-radius: 0.8rem;
  padding: 0.5rem;
  border: 1px solid #e2e8f0;
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.image-preview img {
  max-width: 100%;
  max-height: 200px;
  border-radius: 0.5rem;
  object-fit: contain;
}
.file-size {
  font-family: 'Inter', sans-serif;
  background: #e2e8f0;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  color: #475569;
}

/* DOWNLOAD BUTTON */
.download-area { 
  display: flex; 
  justify-content: center; 
  margin-top: 2rem; 
}
.download-btn {
  background: #0f2b3d;
  color: white;
  padding: 1rem 3.5rem;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(15, 43, 61, 0.2);
}
.download-btn:hover { 
  background: #1e4a6f; 
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(15, 43, 61, 0.3);
}
.download-btn.disabled { 
  opacity: 0.3; 
  pointer-events: none; 
  filter: grayscale(1); 
}





/* FOOTER STYLES */
.site-footer {
  background: linear-gradient(145deg, #0f2b3d, #1e4a6f);
  color: #ffffff;
  padding: 2.5rem 1.5rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
}
.footer-container {
  max-width: 1200px;
  margin: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}
.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.footer-links a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover { color: #3b82f6; }
.social-icons { display: flex; gap: 1rem; }
.social-icons a {
  color: rgba(255,255,255,0.85);
  font-size: 1.2rem;
  transition: color 0.2s, transform 0.2s;
}
.social-icons a:hover { color: #3b82f6; transform: scale(1.1); }
.copyright { text-align: center; margin-top: 1.5rem; font-size: 0.85rem; color: rgba(255,255,255,0.6); }




/* CONVERT HERO */
.convert-hero {
  background: linear-gradient(90deg, #4CAF50, #43a047);
  color: white;
  padding: 70px 20px;
  position: relative;
  overflow: hidden;
}
.convert-hero::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 45%;
  height: 100%;
  background-image: url("https://cdn-icons-png.flaticon.com/512/337/337940.png"),
                    url("https://cdn-icons-png.flaticon.com/512/337/337932.png"),
                    url("https://cdn-icons-png.flaticon.com/512/337/337948.png");
  background-repeat: no-repeat;
  background-size: 80px, 70px, 60px;
  background-position: 80% 20%, 60% 60%, 90% 80%;
  opacity: 0.08;
}
.convert-container {
  max-width: 1100px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}
.convert-text { flex: 1; min-width: 280px; }
.convert-text h1 { font-size: 42px; margin-bottom: 15px; }
.convert-text p { max-width: 520px; line-height: 1.6; font-size: 16px; }
.convert-box {
  flex: 1;
  min-width: 260px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.1);
  padding: 20px 25px;
  border-radius: 10px;
}
.convert-box select { padding: 10px 15px; border-radius: 6px; border: none; font-size: 16px; }
.convert-label { font-size: 20px; font-weight: bold; }

/* BADGES/ADS */
.badge-wrapper {
    display: flex;
    gap: 15px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    padding: 40px 20px;
    width: 100%;
}
.badge {
    text-decoration: none;
    display: flex;
    align-items: center;
    border-radius: 12px;
    padding: 10px 20px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.badge:hover { transform: translateY(-4px); box-shadow: 0 6px 12px rgba(0,0,0,0.1); }
.bmc { background-color: #FDFA8E; border: 1px solid #EAE14F; color: #000; }
.bmc img { height: 30px; margin-right: 10px; }
.bmc-text { font-family: 'cursive', sans-serif; font-size: 22px; font-weight: bold; }
.trustpilot { border: 1px solid #00B67A; color: #333; background-color: #fff; }
.tp-text { font-size: 18px; font-weight: 500; }
.trustpilot img { height: 26px; margin-left: 8px; }
.product-hunt { border: 1px solid #FF6154; color: #FF6154; padding-right: 15px; background-color: #fff; }
.ph-left { display: flex; align-items: center; }
.ph-logo {
    background: #FF6154;
    color: #fff;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 20px;
    margin-right: 12px;
}
.ph-content { display: flex; flex-direction: column; line-height: 1; }
.ph-content small { font-size: 10px; font-weight: 800; letter-spacing: 0.5px; }
.ph-content strong { font-size: 20px; }
.ph-counter {
    margin-left: 15px;
    padding-left: 15px;
    border-left: 1px solid #FF6154;
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 13px;
    font-weight: bold;
}




/* FAQ SECTION */
.faq-section { padding: 60px 20px; display: flex; justify-content: center; }
.faq-container {
    max-width: 1100px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}
.faq-image img { width: 100%; height: auto; }
.faq-title { color: #a34e8d; font-size: 28px; margin-bottom: 25px; }
.faq-item { margin-bottom: 20px; }
.faq-item h3 { font-size: 18px; color: #333; margin-bottom: 8px; }
.faq-item p { font-size: 15px; color: #666; }
.faq-item a { color: #2d8a5e; text-decoration: underline; font-weight: 500; }
.see-all { display: inline-block; margin-top: 5px; text-decoration: none !important; }
.cta-text { margin-top: 30px; font-size: 15px; color: #555; }
.cta-text a { color: #2d8a5e; font-weight: bold; text-decoration: underline; }

/* STEPS SECTION */
.container { background-color: #e0e0e0; padding: 60px 20px; text-align: center; font-family: 'Times New Roman', serif; }
.main-title { color: #944d6c; font-size: 32px; margin-bottom: 50px; font-weight: normal; }
.steps-wrapper { display: flex; justify-content: center; gap: 15px; flex-wrap: wrap; max-width: 1200px; margin: 0 auto; }
.step-card {
    position: relative;
    flex: 1;
    min-width: 300px;
    background-color: #f2f2f2;
    border: 3px solid white;
    padding: 40px 25px 30px 25px;
    text-align: left;
    box-sizing: border-box;
}
.step-tag {
    position: absolute;
    top: -1px;
    left: -3px;
    background-color: white;
    color: #944d6c;
    padding: 5px 25px 5px 10px;
    font-size: 14px;
    font-weight: 400;
    z-index: 10;
    clip-path: polygon(0 0, 85% 0, 100% 100%, 0% 100%);
}
.content-box h3 { margin: 10px 0 15px 0; font-size: 20px; color: #444; font-weight: normal; }
.content-box p { margin: 0; font-size: 17px; color: #555; line-height: 1.4; }




/* FEATURES SECTION */
.features-section{ padding:80px 20px; text-align:center; }
.features-section h2{ font-size:32px; color:#0f6b6b; margin-bottom:60px; font-family: serif; }
.features-grid{
    max-width:1200px;
    margin:0 auto;
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:40px;
}
.feature-card{ background:#ffffff; padding:40px 30px; text-align:left; border-radius:6px; box-shadow:0 8px 20px rgba(0,0,0,0.08); transition:0.3s ease; }
.feature-card:hover{ transform:translateY(-6px); box-shadow:0 12px 25px rgba(0,0,0,0.12); }
.feature-icon{ font-size:32px; color:#0f6b6b; margin-bottom:20px; }
.feature-card h3{ font-size:20px; color:#0f6b6b; margin-bottom:15px; }
.feature-card p{ font-size:15px; color:#444; line-height:1.7; }

/* REVIEWS SECTION */



/* Modern Review Cards Design */
.reviews-section.modern {
    padding: 60px 20px;
    background: linear-gradient(135deg, #fdf6fb, #f3f0ff);
    font-family: 'Inter', sans-serif;
}

.reviews-section .section-header h2 {
    font-size: 2.4rem;
    font-weight: 700;
    color: #4a148c;
    margin-bottom: 15px;
    text-align: center;
    
}

.rating-summary {
    margin-bottom: 50px;
    font-size: 1.1rem;
    color: #ff9800;
    text-align: center;
}

.rating-summary .rating-number {
    font-weight: 700;
    margin-right: 5px;
}

.rating-summary .stars {
    margin: 0 5px;
}

.rating-summary .based {
    color: #555;
    font-size: 0.9rem;
}

/* Grid Layout */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

/* Review Card */
.review-card {
    background: #fff;
    border-radius: 16px;
    padding: 30px 25px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.08);
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.review-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 35px rgba(0, 0, 0, 0.15);
}

/* Decorative top accent */
.review-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, #4a148c, #ff4081);
    border-top-left-radius: 16px;
    border-top-right-radius: 16px;
}

/* Review Header */
.review-card .review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
}

.review-card .review-header h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: #333;
}

.review-card .review-header .stars {
    color: #ff9800;
    font-size: 1.1rem;
}

/* Review Text */
.review-card p {
    font-size: 1rem;
    line-height: 1.7;
    color: #555;
    margin: 0;
}

/* Optional subtle hover glow */
.review-card:hover p {
    color: #333;
}







/* YOUTUBE PROMO */
.youtube-promo{ background:linear-gradient(135deg,#0f5132,#198754); padding:90px 20px; text-align:center; color:#fff; }
.promo-container{ max-width:900px; margin:0 auto; }
.promo-content h2{ font-size:34px; margin-bottom:20px; font-weight:600; }
.promo-content p{ font-size:18px; line-height:1.7; margin-bottom:40px; }
.subscribe-btn{ display:inline-block; background:#ffffff; color:#0f5132; padding:14px 40px; font-size:18px; font-weight:600; border-radius:50px; text-decoration:none; transition:0.3s ease; }
.subscribe-btn:hover{ background:#ffd700; color:#000; }







/* ============================================================ */
/* 추가 (ADDITIONAL) RESPONSIVE FIXES - সকল ডিভাইসের জন্য */
/* আপনার মূল কোড কাট না করে নিচের অংশটি যোগ করা হয়েছে */
/* ============================================================ */

@media (max-width: 1024px) {
    .features-grid, .reviews-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    /* Main Converter Area */
    .converter-panel { grid-template-columns: 1fr; gap: 2rem; }
    .tool-header h1 { font-size: 2rem; flex-wrap: wrap; }
    
    /* FAQ Section */
    .faq-container { grid-template-columns: 1fr; gap: 30px; }
    .faq-image { order: -1; }
    
    /* Hero & Text */
    .convert-text h1 { font-size: 30px; text-align: center; }
    .convert-text p { text-align: center; margin: auto; }
    .convert-box { width: 100%; justify-content: center; margin-top: 20px; }

    /* Steps */
    .step-card { min-width: 100%; margin-bottom: 20px; }

    /* Footer */
    .footer-container { flex-direction: column; text-align: center; }
    .footer-links, .social-icons { justify-content: center; }
}

@media (max-width: 480px) {
    .features-grid, .reviews-grid { grid-template-columns: 1fr; }
    .download-btn { width: 100%; padding: 1rem; }
    .header-container { justify-content: center; gap: 15px; }
    .nav-links { gap: 10px; }
    .badge-wrapper { flex-direction: column; width: 100%; }
    .badge { width: 100%; justify-content: center; }
}



/* --- Mobile Menu Styles --- */
@media (max-width: 768px) {
    .header-container {
        display: flex;
        justify-content: space-between; /* লোগো বামে এবং মেনু ডানে রাখবে */
        align-items: center;
        width: 100%;
    }

    .menu-toggle {
        display: flex; 
        margin-left: auto; /* এটি মেনু টগলকে একদম ডান পাশে ঠেলে দেবে */
    }
}

.menu-toggle .bar {
    width: 25px;
    height: 3px;
    background-color: #0f2b3d;
    transition: 0.3s;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex; /* মোবাইলে দেখা যাবে */
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: -100%; /* শুরুতে বামে লুকানো থাকবে */
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        padding: 2rem 0;
        gap: 1.5rem;
        z-index: 100;
    }

    .nav-links.active {
        left: 0; /* বাটন ক্লিক করলে মেনু চলে আসবে */
    }

    .nav-cta {
        display: inline-block;
        width: 80%;
    }
}

/* বাটন ক্লিক করলে 'X' এনিমেশন */
.menu-toggle.active .bar:nth-child(2) { opacity: 0; }
.menu-toggle.active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.menu-toggle.active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }




/* --- Convert Hero Responsive Fix --- */

/* ১. মেইন কন্টেইনার ফিক্স */
.convert-container {
    padding: 0 20px; /* ডানে বামে প্যাডিং যাতে স্ক্রিনের সাথে লেগে না যায় */
}

/* ২. কনভার্ট বক্স ফিক্স */
.convert-box {
    display: flex;
    flex-wrap: wrap; /* জায়গা না থাকলে এলিমেন্ট নিচে নামবে */
    justify-content: center;
    gap: 10px; /* এলিমেন্টগুলোর মাঝে গ্যাপ */
    padding: 15px;
    height: auto; /* ফিক্সড হাইট থাকলে তা সরিয়ে অটো করবে */
}

/* ৩. সিলেক্ট বক্স এবং বাটন মোবাইল ফিক্স */
.convert-box select {
    flex: 1; /* মোবাইলে সিলেক্ট বক্স সমান জায়গা নিবে */
    min-width: 100px; /* খুব বেশি ছোট হবে না */
}

/* ৪. মোবাইল স্ক্রিনের জন্য বিশেষ কোড */
@media (max-width: 600px) {
    .convert-text h1 {
        font-size: 26px; /* টাইটেল একটু ছোট করা হয়েছে */
        text-align: center;
    }
    
    .convert-text p {
        text-align: center;
        font-size: 14px;
    }

    .convert-box {
        flex-direction: column; /* মোবাইলে সব কিছু একটার নিচে একটা আসবে */
        align-items: stretch;
        width: 100%;
    }

    .hero-convert-btn {
        margin-left: 0 !important; /* মোবাইলে বামের মার্জিন সরিয়ে দেওয়া হয়েছে */
        width: 100%; /* বাটনটি পুরো চওড়া হবে */
        text-align: center;
    }
    
    .convert-label {
        text-align: center;
        display: block;
        margin: 5px 0;
    }
}